You should find that Mundomar will be open. Not exactly a Theme Park as such, more of a Marine Life Animal Kingdom, but well worth a visit.

It is located up on a hill and can be reached on foot depending on how close you are staying to it, although its uphill all the way. If not there are buses that go up there. I think the route number is number *4* but you had best check that.

THIS is the Mundomar Website although some of the pages apear to be broken.